Geoprobe ® brand Dual Tube Sampling Systems are efficient methods of collecting continuous soil cores with the added benefit of casing in drilling. Our line of Dual Tube Soil Sampling Systems probe rods include: DT22, DT325, DT37, DT45, and DT60. Casing in Drilling. Dual tube sampling uses two sets of probe rods to collect continuous soil cores while also performing casing in …
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